Tubular guard for dust-collectors.



P. G. MILLER.

TUBULAR GUARD FOR DUST COLLECTORS.

APPLICATION FILED MAY 20, 1907.

Patented Sept. 20, 1910.

/ A TTORNEY WITNESSES:

.ing. Collectors 0 UNITED STATES PATENT OFFICE.

PHILIP MILLER, OF CHICAGO, ILLINOIS.

TUBULAR GUARD FOB DUST-COLLECTORS.

vortex and then passes it downwar ly along the sides of the conical separating chamber and then out throu h a dust discharge openthis type are usually provided with a downwardly depending tube, generally referred to as a tubular guard, which provides an exit or escape for the purified air. The escaping purified air, still retaining its whirling or gyrating movement, escapes in an annular rin adjacent the'wall of the tubular guard, t e central portion of said guard not being utilized by the escaping purified air. Attempts have been made to solve this ditficulty by breaking up the whirl, and in a measure this is successful. But it does not always cause the air to utilize the entire area of the purified air exit.

My invention has for its object to provide a guard which will not only break up the whirl of the escaping air but will also condense the escapin air in such a manner as to cause it to utilize the entire area of the outlet, thus permittin a material reduction in the size of the sai outlet without a loss in efliciency or increasing the back-pressure upon the fan.

My means of accomplishing the foregoing, may be more readily understood b having reference to the accompanyin rawings, which are hereunto annexed an area part of this specification, in which,

Figure 1 is a side elevation of my improved tubular guard applied to a conical type of dust collector, a art of the exterior belng broken awa to s ow the inner construction of the improved tubular guard. Fig. 2 is a top or plan view of the same. Fig. 3 shows my improved tubular guard applied to another form of dust collector. Fig. 4 is a to or plan View of the same. Fig. 5 is an en arged detail view of my im- Specification of Letters Patent. Patented Sept. 20, Application filed Kay 20, 1907. Serial No. 874,592.

roved tubular efiectors.

Similar reference numerals refer to similar parts throughout the entire description. In the drawin s, 1 is the conical se arating chamber which has, as shown in ig. 3, a vertical 0 linder 2 mounted thereon. 3 is guard showing the curved the tangential inlet, and 4 the dust discharge opening. 5 is my improved tubular guard which 1s constructed of an upper tapering gortion 6 extending from the top 7 of the ust collector downwardly into the separating chamber. The taperin portion extends for approximately one-hal of the length of the tu ular guard, the remaining portion being formed of a'vertical cylindrical portion 8. To this cylindrical portion are attached bafile plates or deflectors 9. These ma be straight or curved, as desired. A col ar 10 may be extended slightly above the head 7 of the collector to provide a suitable mounting for an elbow, where it is desired. The result of this construction is, that the dust-laden air entering through the tangential inlet 3 is whirled rapidly around the interior of the collector, the dust being thrown to the periphery of said whirling body of air and passing down the sides of the conical separating chamber and out through the dust discharge, while the air relieved from the dust passes upwardly and out through the purified air exit; it still retains this gyrating movement, but as soon as it enters the tubular guard it is brought in contact with the deflectors 9 and the whirl is broken up. As it then. passes upwardly it is brought 'in contact with the tapering walls 6 and the .in use.

Having described my invention, What I regard as new, and desire to secure by Letters Patent, is:

1. The combination in a dust collector larged end of the flaring portion,-deflectors ri idly secured to the inner walls of the said tubular guard. H

2. The combination in a dust collector with a central air escape, of a downwardly depending tubular guard, the walls of the upper portion of said guard being flared downwardly and outwardly,the lower portion of 'said guard being cylindrical, deflectors attached to the cylindrical portion of said guard to break up the whirl of the purified air as-it escapes through said ard.

3. In a dust collector, the combination of amass disc arge .at its lower portion with a central air exit a tubular guard depending downwardly from said exit said guard consisting of a lower cylindrical port1on having defiectors rigidly attached to the side walls, an upper portion extending to a contracted air exit, said portion flaring downwardly and outwardly.

P. C. MILLER.

Witnesses:

A. NELSON, P. P. SMITH.

a tapering separating chamber having a dust 

